BULLOCK, C. .; CARAGHIAUR, G. . An Introduction to the Energy Services Industry . Strategic Planning for Energy and the Environment, [S. l.], v. 21, n. 4, p. 9–21, 2023. Disponível em: https://journals.riverpublishers.com/index.php/SPEE/article/view/20367. Acesso em: 29 apr. 2026.